Jsultiplieb



Feb. 24, 1925- 1,527,663

c. E. BEERY MULTIPLIER Filed Jan. 22. 1923 Patented Feb. 24, 1925.

UNITED STATES PATENT A1,527,663 oFFIcE.'

CLINTON E. BEERY, OF CHICAGO, ILLINOIS.

MULTIPLIER.

Application led January 22, 1923.

To all 'whom t may concem Be it known that I, CLINTON E. BEERY, acitizen of the United States, residing in the city of Chicago, in thecounty of Cookand State of Illinois, have invented certain new anduseful Improvements in Multiplier-s, ot' which the following is aspecification.

This invention pertains generally to arithmometers, and has moreparticular reference to a simple form of multiplier adapted for use byschool children, to assist them in lerning and memorizing themultiplication ta le.

The primary purpose of the invention is to provi e a device of thecharacter indicated, .which will be extremely simple in construction andin operation, but which will be of great assistance to the pupil in thatit enables him to visualize simultaneously the multiplicand, themultiplier, and their product.

For the urpose of facilitating an understanding o? my Invention, I haveillustrated on the accompanying drawings a preferred embodiment thereof,from an inspection of which, when considered in connection with thefollowing description, Iny invention, its Inode 0f operation, and manyof its advantages should be readily understood and appreciated.

Referring to the drawings:

Fig. l is a plan view of a multiplier embodying my invention;

Fig. 2 is a side elevation thereof; and Fig. 3 is a sectional view onthe line 33 of Fig. 1.

Referrin to the drawings more in detail, reference c Iaracter 5indicates a board, plate, or the like, made of any suitable material,preferably sheet Inetal, and providing a flat surface adapted to receivea sheet of paper, cardboard, or the like, 6, upon which the products ofthe multiplication table are printed. These products are arranged inrows longitudinally and transversely of the board, as shown in Fig. 1, ahorizontal row, indicated by reference character 7; being the productsof the table of twos, row 8 the roducts of the table of threes, and soon. ikewise, the vertical row 9 comprises the products of the table oftwos, row 11 the products ot' the table of threes, and so on. The topand bottom edges of the plate 5 are turned over to form the anges 12 and13, respectively, beneath which the edges of the sheet 6 are disposed,and the sheet is further Serial No. 614,056.

held in place by the flange 14 on the righthand edge of the plate.

Upon the face of the plate there is mounted a guide Inember 15, which issupported some distance above the face of the board by the downwardlybent endsA 16, which are anchored beneath the flanges 12 and 13, asshown in Fig. 3. A Inovable head 17, slidabl)y disposed upon the member15, is provided with an indicator opening 18, adapted to transverse acolumn of mnltiplicands 19, printed upon a strip 21 disposed in thechannel formed bv the member 15. The head is also provided with a guideportion 22 in which a bar 23 is slidably disposed and adapted to'projectacross the face of the table. The extent of movement of this bar in bothdirections is limited by the upturned end 24 and the downturned end 25,respectively. The head 17 is also provided with another indicator in theform of a sight opening 2G disposed over the bar 23, through which themultipliers 27, printed on a strip 28 disposed in the upwardly openingchannel of the bar 23, Inay be observed. The outer downturned end ol thebar is also provided with an indicator in the form of a sight opening2f), through which that multiplication product over which the sightopening is disposed may be observed. A sheet of transparent material 3l,such as Celluloid, is preferably disposed over the face of the table,and strips ot' similar material are disposed over the multipliers andmultiplicands carried by the guide member and slide bar.l respectively.

My multipliei` is adapted to be used in the following manner. The userslides the head 17 along the guide 15 until the Inultiplicand indicator18 is disposed over the desired multiplicand. The bar 213 is thenadjusted longitudinally until the desired multiplier carried thereby isvisible through the sight opening @t the multiplier indicator 2G. Due tothe construction and arrangement of the parts. the product indicator 29will then be disposed over the product of the indicated multiplicand andmultiplier, and can be readihv observed. For instance, assuming that 5is to be multiplied by 12, the head 17 is adjusted to bring the sightopening 18 over the numeral 5 in the Inultiplicand column, the bai' isthen adjusted to dispose the numeral 12 carried therebyY beneath themultiplier sight opening 26, whereupon, as will be apparent from Fig. 1,the product inwith a product bodiment of the invention has been shownand described for illustrative purposes, the structural details arenevertheless capable of wide variation within the purview of myinvention, as deiined in the following claims.

I claim:

1. A multiplier comprising a table of multiplication products, a columnof multiplicands disposed adjacent thereto, a movably mounted headadapted to traverse said provided with a multiplicand column andindicator and a multiplier indicator, and a member carrying a series ofmultipliers movable upon said head and provided with a product indicatorarranged to indicate on said table the product of any multiplicand andmultiplier designated by their respective indicators.

2. A multiplier comprising a table of multiplication products, a columnof multiplicands adjacent thereto, a member movable longitudinally ofsaid column and provided with multiplicand and multiplier indicators,and a member movable transversely of said first mentioned member,carrying a series of multipliers adapted to be brought into registrationWith said multiplier indicator, said last mentioned member beingprovided with a product indicator adapted to indicate on said table theproduct of the designated multiplicand and multiplier.

3. A multiplier comprising a plate provided on one face with a table ofmultiplication products, a guide secured to said plate and provided witha column of multiplicands, a head slidably mounted on said guide andprovided with a multiplicand indicator and a multiplier indicator, a barslidably mounted in said head and movable therein perpendicular to thedirection of movement of said head, said, bar being provided with aseries of multipliers and being equipped indicator adapted to designateon said table the product of any selected multiplier and multiplicand.

4. A multiplier comprising a plate provided on one face with a, table ofmulti-f plication products, the numerals thereof being arranged invertical and horizontal rows, a guide member mounted on said plateparallel with one side of said table and provided with a column of.multiplicand numerals arranged parallel withfone edge of said table, ahead slidably mounted on said guide member and provided with amultipli-l cand indicator and a multiplier indicator, a bar slidablycarried by said head, said bar being movable transversely to thedirection of movement of said head and being provided with a series ofmultiplier numerals adapted to be disposed in cooperative relation tosaid multiplier indicator, and a product indicator carried by the bar inposition to indicate on said table the product ofthe indicatedmultiplier and multiplicand numerals.

5. A multiplier comprising a plate provided on one face with a table ofmultiplication products, a guide member mounted on said plate andcarrying a column of multiplicands, a head slidably carried by saidmember and provided with multiplier and multip-licand indicators, aguide-way formed in said head and extending at right angles tosaidguidemember, a bar slidably mounted in said guide-way with one endextending over said table, said bar being provided on its upper facewith a series of multiplier numerals, and a product indicator carried bythe projecting end of said bar in position to indicate on said table theproduct of the indicated multiplier and multiplicand.

6. A multiplier comprising a plate pro vided with marginal flanges, asheet held in position on one face' of the plate by said flanges andprovided on the exposed face with a table of multiplication products, achannel shaped slide member elevated above the face of said plate andhaving its ends downturned and anchored beneath the fianges of saidplate, a strip disposed in the channel of said guide and provided with acolumn of multiplicands exposed to view at the top of said guide, a headslidably mounted on said guide` and a multiplier carrier slidablycarried by said head, said head being provided with multiplier andmultiplicand indicators and said multiplier carrier being provided witha multiplication product indicator. Y

CLINTON E. BEERY.

